List-Member version 0.42
========================
NAME
List::Member - PROLOG's member/2: return index of $x in @y.
SYNOPSIS
use List::Member;
my $target = 'bar';
my @look_in = ('foo','baz','bar','etc', 0);
warn "It is a member of the list" if member('bar',@look_in) +1;
warn "It is a member of the list" if member('bar',@look_in) >= 0;
warn "It is a member of the list" if member('ar$',@look_in) >= 0;
warn "Zero is a member of the list" if member('0',@look_in) >= 0;
warn "It is not a member of list" if member('tikkumolam',@look_in) eq nota_member();
DESCRIPTION
A tiny routine to achieve the same effect as PROLOG's "member/2".
Returns the index of supplied scalar in supplied array, or returns the
value of the package's $NEG scalar. This can be over-ridden for the case
when the target is the same as the default -1:
$List::Member::NEG = 'not_a_member';
In the above case, the first two example calls in the POD would need to
be updated.
EXPORT
member
THANKS
Thanks to Benoit Thillaye du Boulay in France, John Day and Michael D
Black in Florida for pointing out bugs in the documentation, and to
the Limbic~Region for pointing out the snivelling nits grumbling about
the lack of support for 0, without filing a bug report.
INSTALLATION
To install this module type the following:
perl Makefile.PL
make
make test
make install
DEPENDENCIES
None
AUTHOR
Lee Goddard
LICENCE AND COPYRIGHT
Copyright (C) 2000-2008 Lee Goddard. All Rights Reserved.
This module is made available under the same terms as Perl.
SEE ALSO
perl(1).